Vehicle Setup

Well, it's 1am again and I'm actually going to go home for once. But before I did, I thought I'd put my latest two problems out there and hope someone can point me in the right direction.

Our vehicle is a car similar to a stock car and should rarely "bounce" up over our track. However, that is happening all over the place. I've attempted tweaking many different settings to no avail. So I figure I should ask the experts out the in community. How can I stop the insanity and keep my car mostly glued close to the ground? (Max 15 degree embankment)

I've read elsewhere that increasing vehicle speed can cause issues with collision. Luckily, I have had that yet. However, the physics seem to take over a little more than I'd like when doing this. Is there any way to diminish the values so that it's more simply straight racing with a smidge factor for physics?

I know I've probably walked right over the answers, but I've found it easier to just ask sometimes instead of beating my head against a wall.

And just an update of where we are. Track is in. Scene is entirely in. Framerate is sitting at about 35-40 on my SLOW machine after reverting BACK on my drivers fo my vid card ;) Adding in audio currently. Simply trying to get the car behaviour down and the steering wheel comfortable. Amazing what you can accomplish in 5 weeks.